Let m and j be two nxn matrices such that
jmj-1=
0 1 0 0
0 0 2 0
0 0 0 1
4 0 0 0
compute the determinant of m.

  -8

Step-by-step explanation:

The determinant of the given matrix is the determinant of M.

It is convenient to find the cofactor of the value 4. It is the opposite of the determinant of the diagonal matrix

whose determinant is the product of the diagonal elements.

Since all the other elements of row 4 of the given matrix are zero, the determinant of M is the product of 4 and -2:

  4(-2) = -8

c is the correct answer

step-by-step explanation:

it's both, now can you answer my most recent question?